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Rational numbers form a proper subset of real numbers. So all rational numbers are real numbers but all real numbers are not rational.
The relationship between addition and subtraction is inverse. We can add two counting numbers together, and we do not need to pay attention to the order of these whole numbers. But, for subtraction, we have to subtract the smallest counting number from the largest counting number.
-- Every whole number is a rational number. -- Any whole number divided by any whole number (except zero) produces a rational number.
Negative number and positive numbers are all numbers. Negative numbers are just positive numbers multiplied by -1.
A rational number is one which can be expressed as a ratio of two integers.